Contact apparatus for the electrical connection of magnetos.



QALMSON.

CONKECHON 0F MAGNETDS.

APPLICATION BLED MAR. 23, 1H6.

Patented May 1, 1917.

mmgzmz.

UNITED PTENT OFFICE.

EMILE JEAN JULES SALIVISON, OF BILLANCOURT, FRANCE, ASSIGNOR TO SOCIETE MOTEURS SALMSON '(SYSTEME CANTON-UNNE), OF BILLANCOURT, FRANCE.

CONTACT APPARATUS FOR THE ELECTRICAL CONNECTION 0F MAGNETOS.

Application filed March 27, 1916.

To all whom it may concern:

Be it known that I, EMILE JEAN JULES SALMSON, citizen of the Republic of France, residing at 9 avenue des Moulineaux, Billancourt, Seine, in the Republic of France, have invented new and useful Improvements in Contact Apparatus for the Electricah Connection of Magnetos, of which the following is a specification.

This invention has for its object to provide an improved contact apparatus for the electrical connection of magnetos which shall be equally applicable to igniting magnetos for internal combustion engines and magnetos for lighting vehicles.

The main characteristic feature of the improved apparatus consists in that while being of remarkably simple construction, it is perfect in operation, and allows of ascertaining the insulation of its component parts at any moment in its manufacture and erection, thereby avoiding the breakdowns that occur so frequently in existing apparatus.

The invention will now be described more particularly with reference to the accompanying drawings in which Figure 1 is a longitudinal section of an example of a contact apparatus constructed. according to the invention, and

Fig. 2 is a cross section on the line aa of Fig. 1.

As shown, 1 indicates generally a part consisting of molded ebonite or other suitable insulating substance, which carries the connections for the primary as well as those for the secondary. It comprises a cylinder 2 having an elongated extension or stem 3. This part 1 is supported for almost the whole of its length by the side piece of the armature frame 4 to which it is fixed by means of screws 5. The end of the winding common to the primary and secondary passes out of the armature in the form of a flexible Wire which is suitably insulated by insulating cloth or other equivalent material and is connected to. a terminal 6. The part 1 has a groove for containing a sheet of foil or other conducting substance 7 that is insulated from the body contact by a tongue of insulating material 8 located likewise in the groove. This sheet of foil 7 serves for connecting the commonterminal 6 of the primary and secondary windings to the collector ring 9 mounted on the Specification of Letters Patent.

Patented May 191 7.

Serial No. 87,140.

ebonite part. On this ring 9 contact is made with the primary by means of the rubbing contact piece 10 ending in the lowtension terminal 11 connected to the inter-- rupter.

Contact with the secondary is made by means of a rigid wire 12 of suitable section, which extends through the mass of ebonite in a hole pierced parallelly to the axis of the said mass at an approximately equal distance from the bottom of the groove and the diametrically opposite portion of the stem 3. This wire 12 is insulated from the ebonite by means of cloth rolled around it or a tube of suitable highly insulating material.

In assembling, the wire 12 can be shifted lengthwise in the ebonite part, and it is connected to the end of the secondary indicated diagrammatically at 13, by the action of a spring l-l which is fastened on the cover 15 that is fixed on the frame by means of stud screws 16. The spring 1% which assures a good contact of the wire 12 at 13 and 17, is connected to the high tension terminal 18.

The drawings show in dash and dot lines the sidepiece 4, the ball bearing 19, the armature frame 20 and a portion of the magneto framing 21 which are not directly parts of the apparatus, but are shown solely for the purpose of facilitating the understanding of the invention.

The great advantage of the hereinbefore described apparatus is that since the contact device consists of an independent part, it is possible after the terminal 11 and the sheet of foil 7 have been fitted into place in the ebonite part, to ascertain the respective insulation of those parts before mounting the magneto, so that any piece which is not satisfactory can be at once rejected, or re-made, without having to dismount the magneto, which it has been necessary to do with the heretofore known apparatus.

Moreover, it will be perceived that this extremely important result is obtained with a very simple and strong construction which can be easily manufactured, while the electric contact between the fixed and movable parts is perfectly secured. In the case of damage to the magneto, the very rapid removal of the part-s 3 and 4 allows of examining the connections which are the weak points of such apparatus.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1 A contact apparatus for the electrical connection of magnetos comprising in combination a rigid molded part of insulating substance, a conductor suitably insulated from the body contact in said part, a terminal to which is connected said conductor and the common end of the primary and secondary circuits, a collector ring connected to the said conductor, a contact rubbing against said collector ring and connected to the low-tension terminaha conducting rod connected at one end of the secondary, and a ,cover provided with a spring bearing against the other end of the said rod and connected to the high tension terminal, substantially as described and for the purpose set-forth.

2. A contact apparatus for the electrical connection of magnetos comprising in-com- 'bination a rigid molded part of insulating substance formed of acylindrical head having an elongated extension supported by the side piece of the armature frame, a conductor suitably insulated from the body contact in said part, a terminal to which is connected said conductor and the common end of the primary and secondary circuits, a collector ring connected to the said conductor, a contact rubbing against said collector ring and connected to the low tension terminal, a conductingrod connected at one end to the end of the secondary, and a cover provided with a spring bearing against the other end of the said rod and connected to the high tension terminal, substantially as described and for the purpose set forth.

3. A contact apparatus for the electrical connection of magnetos comprising in combination a rigid molded part of insulating substance formed of a cylindrical head having an elongated extension, a sheet of con-.

ducting substance located in an outer groove of the molded part and insulated from the body contact by a tongue of insulating material, a terminal to which is connected said sheet of conducting substance and the common end. of the primary and secondary circuits, a collector ring connected to said sheet I of conducting substance, a contact rubbing against said collector ring and connected to the low-tension terminal, a'conducting rod extending through a longitudinal hole pierced in the rigid molded part and con 

